Introduce triaging vocabulary

app/models/card.rb

@@ -1,11 +1,10 @@
 class Card < ApplicationRecord
   include Assignable, Attachments, Cacheable, Closeable, Colored, Entropic, Eventable,
     Golden, Mentions, Multistep, Pinnable, Postponable, Promptable, Readable, Searchable,
-    Staged, Stallable, Statuses, Taggable, Watchable
+    Staged, Stallable, Statuses, Taggable, Triageable, Watchable
 
   belongs_to :collection, touch: true
   belongs_to :creator, class_name: "User", default: -> { Current.user }
-  belongs_to :column, optional: true
 
   has_many :comments, dependent: :destroy
   has_one_attached :image, dependent: :purge_later

app/models/card/triageable.rb

@@ -0,0 +1,10 @@
+module Card::Triageable
+  extend ActiveSupport::Concern
+
+  included do
+    belongs_to :column, optional: true
+
+    scope :untriaged, -> { where.missing(:column) }
+    scope :triaged, -> { joins(:column) }
+  end
+end

app/models/collection.rb

@@ -1,11 +1,10 @@
 class Collection < ApplicationRecord
-  include AutoClosing, Accessible, Broadcastable, Entropic, Filterable, Publishable, Workflowing
+  include AutoClosing, Accessible, Broadcastable, Entropic, Filterable, Publishable, Triageable, Workflowing
 
   belongs_to :creator, class_name: "User", default: -> { Current.user }
 
   has_rich_text :public_description
 
-  has_many :columns, dependent: :destroy
   has_many :cards, dependent: :destroy
   has_many :tags, -> { distinct }, through: :cards
   has_many :events

app/models/collection/triageable.rb

@@ -0,0 +1,7 @@
+module Collection::Triageable
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :columns, dependent: :destroy
+  end
+end